models by definition
Math models refer to the construction of an arithmetic problem by drawing a picture. In Singapore Math, the word problem models are a specific, unit-based drawing that enables students to calculate answers to multi-step problems without knowing algebra.
Learn more about Singapore Math by visiting these online resources:
NPR Talk of the Nation interview on Singapore Math (transcript & audio file)
American Institute of Research: AIR_2009_MathStandards
Math in Education: An Inconvenient Truth (YouTube video)